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Energy

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  • What happens in CONDUCTION in HEAT?
    During conduction, the objects must be touching each other for energy transfer to take place.
  • The amount of kinetic energy an object has depends on what 2 things?
    The mass (m) of the object and the speed (v) of the object.
  • What is an Energy system?
    In an Energy System, energy is TRANSFORMED from one form into another.
  • Give 3 forms of kinetic energy
    1. Vibrational 2. Rotational 3. Translational
  • What is THERMAL ENERGY?
    The energy that comes from the temperature of the heated substance.
  • What is POTENTIAL ENERGY?
    POTENTIAL ENERGY is energy stored in an object.
  • What three things make up an energy system?
    1. INPUT 2. PROCESS 3. OUTPUT
  • What is ELECTRICAL ENERGY?
    Particles traveling through a wire to create an electric current is electrical energy.
  • In which 3 ways does HEAT ENERGY TRANSFER happen?
    Heat (energy transfer) occurs in three ways: 1. CONDUCTION 2. CONVECTION 3. RADIATION
  • What are good CONDUCTORS and bad CONDUCTORS of HEAT?
    1. Metals are good conductors of heat. Non-metal materials are good insulators of heat. Non-metals, like plastic are bad conductors of heat.
  • What is RADIATION in HEAT?
    Radiation is the transfer of energy where objects do not have to be physically touching. Like the sun radiates heat.
  • What is KINETIC ENERGY?
    Kinetic energy is the ENERGY OF MOTION.
  • Do moving object have Potential or Kinetic Energy?
    kinetic energy
  • What is CONVECTION in HEAT?
    Convection is the transfer of energy within liquids or gases.
  • Give examples of Energy Systems?
    1. Mechanical systems 2. Thermal systems 3. Electrical systems 4. Biological systems
  • When you boil water is energy created?
    No energy has been created, it has been transferred.
  • What is LIGHT ENERGY?
    A reflection/ scattering or from a light source.
  • What is GRAVITATIONAL potential energy?
    Gravitational potential energy is energy an object possesses because of its position in a gravitational field.
  • What is HEAT measured in?
    Heat is measured in joules (J). This is because heat is a transfer of energy.
  • What is Energy measured in?
    Energy is measured in joules (J).
  • What is TEMPERATURE? What is its unit?
    Temperature is a measure of how hot or cold a substance feels and it is measured in degrees Celsius (°C).
  • What are good and bad absorbers of RADIANT HEAT?
    Dark, matt surfaces are good absorbers of radiant heat. 2. Light and shiny surfaces are poor absorbers of radiant heat. Light, shiny surfaces reflect heat.
  • What can we use to minimize HEAT LOSS or GAIN from a system. Like if we don't want the hot air to leave our bodies in winter?
    Insulating materials. Like a thick winter jacket.
  • What happens in a THERMAL ENERGY SYSTEM?
    Thermal energy is transferred from one object to another.
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